Description
Slanetz and Bartley Medium is recommended for detection and enumeration of faecal Streptococci by membrane filtration technique.
The medium is highly selective for Enterococci. Sodium azide inhibits gram-negative organisms.
Triphenyl Tetrazolium Chloride is reduced to the insoluble formazan inside the bacterial cell forming dark red-coloured colonies.
Enterococcus faecalis grows luxuriantly as red or maroon colonies while Escherichia coli is inhibited on this medium.